Basic Info.
Certification
CE, ISO, RoHS
Pump Optic Transmission Power
400MW
Product Description
Product Description
1. Erbium-doped Fiber Amplifier, due to multiple cascades and the accumulation of noise caused by spontaneous emission, will reduce the system CNR greatly and thus it will limit the transmission capacity and distance of the system. Raman Fiber Amplifier (RFA) is a newly designed fiber amplifier based on Stimulated Raman Scattering (SRS) effect. It is considered as the core technology of new generation DWDM fiber over-long communication. Compared with Erbium-Doped Fiber Amplifier, Raman amplifier has the advantage of low Noise Figure (NF), wider gain bandwidth, flexible gain spectral region and stable temperature. It is the only device that can operate in 1300~1600nm.
2. The gain medium of EDFA is Erbium-doped Fiber (EDF). It is a separated amplifier and its signal light can only be amplified after putting into EDFA. The gain medium of Distributed Raman Amplifier is Single Mode Fiber (SMF) which is for signal light transmission. Its gain area is distributed at long transmitting fiber that is 25km from the output end. That is to say, the signal light is amplified 25km before it reaches the output end of the transmitting fiber.
3. Low noise figure marks the super advantages as following: (1)During Single Mode Fiber(G.652) transmission, adopting Distributed Raman Amplifier, it can reduce the loss for 5.5dB (Typical value) at effective cross-distance. Compared with EDFA, it equals that the effective distance is reduced for 25km, (fiber loss is calculated as 0.22dB/km). Therefore, the input power to the fiber is reduced and the damage of fiber non-linearity effect (SBS) is weakened. (2) In OSNR calculation, the Equivalent Noise Figure of distributed backward pump Raman Amplifier is 0dB, typical value 0 ~ -2dB, which has remarkable help for improvement of cross-band length, increase system OSNR and transmission distance.
4. But Raman amplifier also has its disadvantages. Its gain is very low, not exceed 16 dB in actual application. Although the noise figure of EDFA is incomparable with Raman amplifier, its small signal gain can be higher that 30dBm. So the Raman amplifier is always combined with EDFA in system application. Hybrid Raman Amplifier combined both the two amplifier is an idea solution. When an backward EDFA (If GP=10dBm, NF=5.5Db) combines with one pre-distributed Raman Amplifier (if GP=10dB, NF=-0.5dB), the gain of hybrid Raman amplifier (Raman + EDFA) will reach to GP=200Db and NF=0.96dB.
5. RFA7000 is a combination of RFA and EDFA to get flat Gain spectrum and high Optical Signal Noise Ratio (OSNR) . The un-relayed distance can be extended up to 30~50km and CNR can be improved for 4.5~6dB.
Product Features
1. Perfect laser APC, AGC, ATC closed-looped circuit ensuring long life and stable operation of the pump laser.
2. Low noise figure and flat gain.
3. Adopts famous Fitel Raman pump laser.
4. Different raman gain and EDFA output power optional , be suitable for different network.
5. Optimized structure, easy to use.
Main Application
1. Fiber CATV system, extra-long trunk that is inconvenient for building
relay station. Relay distance > 60Km.
Single span distance > 80Km.
2. DWDM, CATV extra-long trunk optical transmission system.
3. Submarine optical transmission system.
Technical Index
| Performance | Index | Supplement |
| Min. | Typ. | Max. |
| Optic feature | Wavelength | (nm) | 1528 | | 1604 | RFA7000 C & L-Band |
| Pump optic transmission power | (mW) | 400 | | | |
| Raman switch gain | (dB) | 7 | 8 | 9 | RFA7008 |
| 9 | 10 | 11 | RFA7010 |
| 11 | 12 | 13 | RFA7012 |
| 13 | 14 | 15 | RFA7014 |
| 15 | 16 | 17 | RFA7016 |
| Gain flatness | (dB) | | 1.0 | | RFA7000/F (With GFF) |
| | 2.0 | | RFA7000 (Without GFF) |
| Noise flgure | (dB) | | | 0 | |
| Polarization mode dispersion | (ps) | | | 0.2 | |
| Polarization dependence gain | (dB) | | | 0.4 | |
| Polarize related loss | (dB) | | 0.1 | | |
| General feature | Work voltage | (V) | 90 | | 265 | -48VDC optional |
| Power Consume | (W) | | 30 | | |
| Work temp | (ºC) | 0 | | 60 | |
| Storage temp | (ºC) | -40 | | +85 | |
| Relative humidity | (%) | 5 | | 95 | |
| Size (W)×(D)×(H) | (mm) | 483×368×44 | 1U |
| 483×368×88 | 2U |
Flow Chart
Shipping Mode
FAQ
1. What are the payment terms of payment?
Usually, we accept T/T, PayPal, Western Union, and Alibaba Trade Assurance. You can select the terms of payment which is more convenient for you.
2. What about the lead time?
Usually, if there's stock, we ship the goods within 5-7 working days after the deposit is confirmed. If it is out of stock, the lead time depends.
3. How about the shipping?
When the package is small, we will deliver the goods via international Express like FedEx , DHL,TNT and UPS and so on. Door to door delivery service will be provided; while the goods have high weight and volume, we suggest using air or sea shipment.
4. Can you do OEM for us?
Yes. if there is a certain order quantity, we can do OEM including printing, logo, and customized model for you.
5. What are the advantages of your products?
A. Good quality and competitive prices
B. Strict quality control during production process.
C. Professional operations in processes of production, sales, assembling, packaging and shipping
D. Good after-sale service. Professional online technical support can be provided. Moreover, if there is any problem of the goods, we will help to solve the problem or provide replacement of the goods
6. How about the Warranty?
There are 12 months for the warranty. While the warranty is not responsible for those broken by violence or updated with other brands.
Address:
No. 7 Xiyuan Road, Xihu Diserict, Zhejiang Province, Hangzhou, Zhejiang, China
Business Type:
Trading Company
Business Range:
Electrical & Electronics, Industrial Equipment & Components, Manufacturing & Processing Machinery, Service
Management System Certification:
ISO 9001
Company Introduction:
GT LASERS′s predecessor was HUATAI OPTIC, it was founded in Hangzhou, China in 1999, It is the global leader of optical fiber communication technology, and has made great contributions to the integration of global cable TV in FTTH. After 10 years of technical precipitation and accumulation, GT LASERS was founded in 2009, Respond to new infrastructure investment such as global artificial intelligence and industrial Internet, Continue to make breakthroughs in the larger and broader infinite space of the optical field and enter the advanced laser manufacturing field.
We have over 10000 of production plant and over 3000 of R&D center, and We have 20 Years of OEM Customer Customization Experience.
We close cooperation with global college laboratories and scientific research institutions.
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